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Cells from lining of bladder
Cells from lining of trachea
These groups of cells represent different
(1) tissues in which similar cells function together
(2) organs that help to carry out a specific life
activity
(3) systems that are responsible for a specific life
activity
(4) organelles that carry out different functions
2. When organisms break the bonds of organic compound

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?